Improvement in machines for making sheet-metal moldings



W. H. CLARK, W. .T. CLARK & A. 0. KITTREDGE.

MACHINE FOR MAKING SHEET METAL HOLDINGS. No.1'71,917. Patented Jan.11,1876:.

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RPETERS. PHOTO UTHOGRAPHER WASH NGTON D C UNITED STATES PATENT OFFICE.

. WILLIAM H.- QLAQRK,IWILLIAM J. CLARK, AND Anson o. KITTREDGE, or

SALEM, OHIO, ASSIGNORS TO THE KITTREDGE OORNIOE AND ORNAMENT COMPANY, OF SAME PLACE.

IMPROVEMENT IN MACHINES FOR MAKING SHEET-METAL MOLDING S.

Specification forming part of Letters Patent No. 171,917, dated January 11, 1876; application filed 'October. 4, 1875.

CASE .A.

Be it known that we, WILLIAM H. CLARK,

WILLIAM J. CLARK, and ANsoN 0.5Krr- TREDGE, of Salem, in the county of Columbiana and State of Ohip, have invented a certain new and Improved Machine for Making Sheet-Metal Moldings for Arches, of which the following is a full, clear, and complete description, reference being bad to the accompanying drawings making part-of this specification, in which Figures 1 and 2 are side and end views of the machine. Fig. 3 is a plan view.

Like letters of reference refer to like parts in the several views.

This invention is for making arched sheetmetal molding for window and door caps, and other arch-moldings, and which consists of a pair of dies, male and female, co-operatin g in combination with a pair of guides, arranged one on each side of the dies, whereby the cur- 'vature of the arch is maintained while the same is being passed between the dies for having the molding formed thereon.

Of the construction of the above said machine and its practical working the following is a more full description.

In the drawings, A represents a base 01' block, whereon is secured a die, B, by means of a slotted standard, 0, in the slot of which the die is held and secured by a screw or bolt, D.

It will be seen that said die consists of a thin plate of metal, in the upper edge of which is formed the profile or contour of a certain style of molding, as shown at b, Fig. 2.

The die B referred to is the lower one. A corresponding upper one is shown at E, which also consists of a thin plate of metal, and is arranged directly in a right line above it, so that it may co-operate therewith on the sheet for forming the molding. On each side of the die B is arranged guides, F G, or their equivalents for the same object and result. Said guides consist of thin plates of metal, similar to the dies E and B, and having in their upper edge or face a form of molding like that in the face of the die B, as will be seen at b.

The guides referred to are held in position by a clamp, H, and secured therein by a bolt, 0.

'The stem of the clamp consists of ascrew, I,

forming a-standard whereby the guides are secured in the base by being screwed into jamnuts J K, one above the base and one below, as will be seen in Fig. 1.

By means of the jam-nuts the guides can be easily and readily adjusted in their relation to the die B as to height and angle, for a purpose presently shown. The following is a description of the practical operation of the machine.

As above said, this machine is forv forming the moldings in sheet metal for arches-as, for instance, windows and doors which have arched caps, and for other purposes requiring arching moldings. To this end a piece of sheet metal is cut to the required curve for the arch, the curvature of which may be more or less, as the nature of the Work may demand. This being done the two guides F G are then so adjusted in their relation to the die B as to form two radii of a circle, or they may be adjusted to curved lines, of which the 7 piece of metal referred to may be a segment or are. The guides, when thus adjusted, are shown in Figs. 1 and 3, in which it will be seen that the guides on either side of the die are not parallel therewith; but which, together with the die B, form three sections of radial lines, and which may be supposed to be the radii of the circle or other curve, of which the piece of metal for the arch is a segment.

In order to form the moldings on the segment referred to, one end thereof is laid upon the face of the die B under the die 'E, and

permitted to rest on a guide at the side. The upper die is now made to strike down upon it with light rapid strokes, or rather by compressive strokes than by sharp percussive blows, thereby conforming the metal to the shape of the face of the dies, as it is passed along between them, not wholly at the first pass, but by repeated-passes, as the thickness of the metal or the style of the molding may render it necessary. As the metal passes between the dies the partially-formed curves and angles of the molding will fit in the face of the guides,and prevent the metal from lateral movement while being acted upon by the dies; also, in consequence of the radial relation of the guides to the segmental curve 2 of the metal they guide it along in its curvilinealcourse between the dies. Hence, formarches of any desired degree of curvature can be made by. this machine.

narrow and thin dies we are enabled to turn quick curves, even with profiles having large membersa thing very difficult to do by other means.

By using these The side guides, by means of adjusting screws and nuts connected therewith, as shown,

allow said guides to be adjusted either above or below the dieB, asmay be expedient. This vertical adjustment of thetguides admitsiofl moldings being made up. of a hoop and cylin drical form, or in sections? thereof. This is done by arranging the guides. and dieBfparallelwith each other, or nearly so, andhtheu moving the guides, either above or. below the die B, to the desired :point, as may be required for. the diameter. ofthe cylindricall.

moldings. a

The upper dieis operated by being fiired in I the head of a power-hammer actuatedby a cam, sothatthe die may notyfall so suddenly or decidedly as when actuated by a trip in the ordinary way. A more compressive action of a v.

the die thereby is obtained on the metal. 3 .The

construction of the hammer and general opera- 1 tion are similar to the ordinary power-ham;

mers in use, or may. be simplyla modification of them.

What we claim as our invention, and desire to secure by Letters Patent, isl l a The adjustable guides EG, .in combination with the die B, substantially as described, ;and I a 1 for the purpose 'set forth. 1 WM. H.jOLAB-K.

WILLIAMJ. GLARKEY 1 Witnesses: 1 y l R. H. GARRIGUES, R. J. THOMSON. 

